Elexhere

The Insane Engineering Behind a DIY Real-Time Spray Paint Mixer - Hackster.iohttps://www.hackster.io/news/the-insane-engineering-behind-a-diy-real-time-spray-paint-mixer-b6dfbad35568

Paint

Sandesh Manik wanted a kind of real-time color-mixing system for spray paint and bringing that to life required some insane engineering.

Build This Open-Source Graphics Calculator | Hackadayhttps://hackaday.com/2026/03/23/build-this-open-source-graphics-calculator/

Graphics calculators are one of those strange technological cul-de-sacs. They rely on outdated technology and should not be nearly as expensive as they are, but market effects somehow keep prices w…

The 3DFX Voodoo Lives Again In An FPGA | Hackadayhttps://hackaday.com/2026/03/22/the-3dfx-voodoo-lives-again-in-an-fpga/

FPGA
3d

The 3DFX Voodoo was not the first dedicated 3D graphics chipset by any means, but it became the favourite for gamers among the early mass-market GPUs. It would be found on a 3D-processing-only PCI …

How I 3D Printed My Own Lego-Compatible Train Bridges | Hackadayhttps://hackaday.com/2026/03/16/how-i-3d-printed-my-own-lego-compatible-train-bridges/

Lego train sets have been available for decades, now. The Danish manufacturer long ago realized the magic of combining its building block sets with motors and plastic rails to create real working r…

This Printed Zipper Repair Requires No Unsewing | Hackadayhttps://hackaday.com/2026/03/14/this-printed-zipper-repair-requires-no-unsewing/

If a zipper breaks, a 3D printer might not be the first tool one reaches for — but it’s more feasible than one might think. [MisterJ]’s zipper slider replacement is the kind of 3D…

3D Printing A Harmonic Pin-Ring Gearing Drive | Hackadayhttps://hackaday.com/2026/03/11/3d-printing-a-harmonic-pin-ring-gearing-drive/

3dprint

Cycloidal drives are a type of speed reducer that are significantly more compact than gearboxes, but they still come with a fair number of components. In comparison, the harmonic pin-ring drive tha…

A Rotary Dial The 3D Printed Way | Hackadayhttps://hackaday.com/2026/03/11/a-rotary-dial-the-3d-printed-way/

3dprint
Dual

There’s a meme which may have a basis in truth, of a teenager left clueless when presented with a rotary telephone. The dial, in reality a mechanical pulse chain generator, was once ubiquitou…

Boom Boy Is the Answer to “What If Nintendo Made a Boombox?” - Hackster.iohttps://www.hackster.io/news/boom-boy-is-the-answer-to-what-if-nintendo-made-a-boombox-0f8f3f95e70d

Music

What if Nintendo had made boomboxes instead of consoles? It might have looked something like this Boom Boy.

The Ultimate Productivity Killer: Doom Arrives on the Office Desk Phone - Hackster.iohttps://www.hackster.io/news/the-ultimate-productivity-killer-doom-arrives-on-the-office-desk-phone-4b95e50a577b

Doom
phone

From corporate calls to Cacodemons: a hardware hacker turned a 20-year-old VoIP office phone into a playable Doom machine.

GitHub - shufps/diy-projector-clock: DIY Projector Clockhttps://github.com/shufps/diy-projector-clock

DIY Projector Clock. Contribute to shufps/diy-projector-clock development by creating an account on GitHub.

A Projection Clock You Can Actually See During the Day - Hackster.iohttps://www.hackster.io/news/a-projection-clock-you-can-actually-see-during-the-day-93367d0570cf

Frixos is a high-power ESP32 projection clock that stays crystal clear in daylight and syncs with Home Assistant to track your entire life.

The Long Afterlife Of The Console Modchip | Hackadayhttps://hackaday.com/2026/03/01/the-long-afterlife-of-the-console-modchip/

For a late-1990s engineer with good soldering skills, many a free pint of beer could be earned by installing modchips on the game consoles of the day. Modchips were usually a small microcontroller …

Easily Replaceable USB-C Port Spawned By EU Laws | Hackadayhttps://hackaday.com/2026/02/26/easily-replaceable-usb-c-port-spawned-by-eu-laws/

Usb-c

The USB-C port has become a defacto connectivity standard for modern devices, largely supplanting the ugly mess of barrel jacks and micro USB connectors that once cursed us. While their reliability…

Stop Ironing 3D Prints | Hackadayhttps://hackaday.com/2026/02/25/stop-ironing-3d-prints/

3dprint

If you want smooth top surfaces on your 3D printed parts, a common technique is to turn on ironing in your slicer. This causes the head to drag through the top of the part, emitting a small amount …

Bringing Flip-Dot Displays Into the 21st Century - Hackster.iohttps://www.hackster.io/news/bringing-flip-dot-displays-into-the-21st-century-4cbc186d6f35

Display

Unlock the magic of vintage flip-dot displays with this modern hardware hack that brings retro mechanical pixels back to life.

X-Ray A PCB Virtually | Hackadayhttps://hackaday.com/2026/02/23/x-ray-a-pcb-virtually/

Pcb
Reverse

If you want to reverse engineer a PC board, you could do worse than X-ray it. But thanks to [Philip Giacalone], you could just take a photo, load it into PCB Tracer, and annotate the images. You c…

sylverb/game-and-watch-retro-go-sdhttps://github.com/sylverb/game-and-watch-retro-go-sd?tab=readme-ov-file#pre-modded-options

Contribute to sylverb/game-and-watch-retro-go-sd development by creating an account on GitHub.

Scanning Table For The Professional Maker | Hackadayhttps://hackaday.com/2026/02/10/scanning-table-for-the-professional-maker/

Sometimes the simplest objects need some overthinking. This is exactly what [Chris Borge] realized when using his 3D scanner and finding that the included rotation table left quite a bit to be desi…

A DIY Retro-Modern Alarm Clock for Under $10 - Hackster.iohttps://www.hackster.io/news/a-diy-retro-modern-alarm-clock-for-under-10-4e4e972345d8

Build your own ESPclock with a Wemos D1 mini and a 3D-printed case for a customizable, budget-friendly DIY alarm clock.

A CNC Dock for the Etch A Sketch - Hackster.iohttps://www.hackster.io/news/a-cnc-dock-for-the-etch-a-sketch-e4f8bf24581e

Game

Engineer Nikodem Bartnik built the "CNC A Sketch," a robotic dock using a Raspberry Pi Pico to turn images into perfect Etch A Sketch art.